A double-row bearing vibration detection method and system

Abstract

The present invention relates to the field of vehicle bearing detection technology, and in particular, to a double-row bearing vibration detection method and system. The method includes: based on the completion of the positioning of the bearing assembly on the detection assembly, controlling the rotating table to rotate at a first speed; based on the rotation of the rotating table at the first speed, obtaining the first measurement data of the first detection unit and the second measurement data of the second detection unit; based on the first measurement data and the second measurement data, adjusting the position of the first detection unit at the connection end; based on the completion of the position adjustment of the first detection unit, controlling the rotating table to rotate at a second speed; based on the rotation of the rotating table at the second speed, obtaining the third measurement data of the first detection unit and the fourth measurement data of the second detection unit; based on the third measurement data and the fourth measurement data, analyzing and outputting the vibration detection result of the bearing assembly. This solves the problem of how to use a small number of sensors for vibration detection of bearings.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle bearing detection, and in particular to a double-row bearing vibration detection method and system. Background Art

[0002] The wheel hub bearing is one of the key parts of the automobile. Its main function is to bear weight and provide precise guidance for the rotation of the wheel hub, which requires it to withstand not only axial loads but also radial loads. A worn or damaged wheel hub bearing or wheel hub unit will cause inappropriate and costly failures while the vehicle is driving, and even cause damage to the vehicle's safety.

[0003] Therefore, vibration testing is required before wheel hub bearings leave the factory to check whether the products have defects in advance. Due to the particularity of wheel hub bearings, the roughness of the outer surface of the outer ring is different, which will interfere with the vibration measurement results. The existing solution is to use multiple sets of sensors for measurement, so as to perform a large amount of data analysis to eliminate abnormal data and finally obtain the analysis results, which has low detection efficiency and high detection cost. Summary of the invention

[0004] In order to solve the problem of how to use a small number of sensors to perform vibration detection on a bearing, the present invention provides a double-row bearing vibration detection method and system.

[0005] In a first aspect, the present invention provides a double-row bearing vibration detection method, the double-row bearing vibration detection method comprising:

[0006] Step S10, based on the completion of the positioning of the bearing assembly on the detection assembly, control the rotating table to rotate at a first speed; wherein the bearing assembly includes an inner ring unit, a rolling unit and an outer ring unit; the inner ring unit and the outer ring unit are rotationally connected through the rolling unit; the detection assembly includes a machine unit, a first detection unit and a second detection unit; the machine unit includes the rotating table and a lower pressure head; the inner ring unit is detachably connected to the rotating table; the lower pressure head limits the rotation of the outer ring unit; the end of the outer ring unit close to the rotating table is the connecting end; the end of the outer ring unit away from the rotating table is the assembly end; the first detection unit is in contact with the outer circumferential surface of the connecting end; the second detection unit is in contact with the outer circumferential surface of the assembly end; the outer circumferential surface roughness of the connecting end is greater than the outer circumferential surface roughness of the assembly end;

[0007] Step S20, based on the rotation of the rotating table at the first speed, acquiring first measurement data of the first detection unit and second measurement data of the second detection unit;

[0008] Step S30, adjusting the position of the first detection unit at the connection end based on the first measurement data and the second measurement data;

[0009] Step S40, based on the completion of the position adjustment of the first detection unit, controlling the rotating table to rotate at a second speed;

[0010] Step S50, based on the rotation of the rotating table at the second speed, acquiring third measurement data of the first detection unit and fourth measurement data of the second detection unit;

[0011] Step S60: Analyze and output the vibration detection result of the bearing assembly based on the third measurement data and the fourth measurement data.

[0012] In some embodiments, step S30 includes:

[0013] Step S31, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak value of the first measurement data to the peak value of the second measurement data being less than a first preset ratio;

[0014] Step S32, repeating step S20 and step S31 until the ratio of the peak value of the first measurement data to the peak value of the second measurement data is greater than the first preset ratio.

[0015] In some embodiments, step S30 includes:

[0016] Step S33, adjusting the position of the first detection unit along the circumference of the outer ring unit based on the ratio of the number of wave peaks of the first measurement data to the number of wave peaks of the second measurement data being greater than a second preset ratio;

[0017] Step S34, repeating step S20 and step S33 until the ratio of the number of peaks of the first measurement data to the number of peaks of the second measurement data is less than the second preset ratio.

[0018] In some embodiments, a plurality of the first detection units are distributed around the circumference of the outer ring unit;

[0019] The step S30 comprises:

[0020] Step S35, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak values ​​of any two of the first measurement data exceeding a preset range; wherein the preset range is 1±n; n is less than 1;

[0021] Step S36, repeating the step S20 and the step S35 until the ratio of the peak values ​​of any two of the first measurement data is within the preset range.

[0022] In some embodiments, the first speed is greater than or equal to the second speed;

[0023] The step S20 further includes: accumulating a first rotation time length of the rotating table based on the rotating table rotating at the first rotation speed;

[0024] The step S50 further includes: based on the rotating table rotating at the second rotation speed, accumulating a second rotation time length of the rotating table; the first rotation time length is shorter than the second rotation time length.

[0025] In some embodiments, step S60 includes:

[0026] Step S61, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data being less than a third preset ratio;

[0027] Step S62, repeating step S50 and step S61 until the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data is greater than the third preset ratio;

[0028] Step S63, adjusting the position of the first detection unit along the circumference of the outer ring unit based on the ratio of the number of wave peaks of the third measurement data to the number of wave peaks of the fourth measurement data being greater than a fourth preset ratio;

[0029] Step S64, repeating step S50 and step S63 until the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data is less than the fourth preset ratio;

[0030] Step S65, output the vibration detection result of the bearing assembly based on the fact that the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data is greater than the third preset ratio and the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data is less than the fourth preset ratio.

[0031] In some embodiments, the detection component includes a machine unit, a first detection unit, and a second detection unit; the machine unit includes a machine base, a rotating table, and a pressing head; the rotating table is rotatably connected to the machine base; one end of the pressing head is slidably connected to the machine base; the first detection unit includes a first controller and a first vibration transmission rod; the first controller is drivingly connected to the first vibration transmission rod; the second detection unit includes a second controller and a second vibration transmission rod; the second controller is drivingly connected to the second vibration transmission rod;

[0032] A bearing assembly, the bearing assembly comprising an inner ring unit, a rolling unit, an outer ring unit, and a sealing unit; the inner ring unit and the outer ring unit are rotatably connected through the rolling unit; the inner ring wall of the sealing unit abuts against the outer peripheral wall of the inner ring unit; the outer ring wall of the sealing unit abuts against the inner peripheral wall of the outer ring unit;

[0033] The inner ring unit is detachably connected to the rotating table; the lower pressure head limits the rotation of the outer ring unit; the outer ring unit includes a mating ring, a mounting ring, and a connecting ring; the mating ring, the mounting ring, and the connecting ring are integrally formed in sequence; the connecting ring is arranged at one end of the outer ring unit close to the rotating table; one end of the first vibration transmission rod is in contact with the outer circumferential surface of the connecting ring; one end of the second vibration transmission rod is in contact with the outer circumferential surface of the mating ring; the outer circumferential surface roughness of the connecting ring is greater than the outer circumferential surface roughness of the mating ring.

[0034] In some embodiments, the first vibration transmitting rod includes a first rod body, a first rod head, and a first spring; one end of the first rod head abuts against the outer circumferential surface of the connecting ring, and the other end is slidably connected to the first rod body; the end of the first rod body away from the first rod head is drive-connected to the first controller; the first spring is arranged on the first rod body; the first spring applies an elastic force to the first rod head; the first rod head has a tendency to escape from the first rod body under the action of the elastic force of the first spring; the second vibration transmitting rod includes a second rod body, a second rod head, and a second spring; one end of the second rod head abuts against the outer circumferential surface of the connecting ring, and the other end is detachably connected to the second rod body; the end of the second rod body away from the second rod head is drive-connected to the second controller; the second spring is arranged on the second rod body; the second spring applies an elastic force to the second rod head; the second rod head has a tendency to escape from the second rod body under the action of the elastic force of the second spring; the minimum diameter of the first rod head is smaller than the minimum diameter of the second rod head.

[0035] In some embodiments, at least two of the first detection units are arranged at intervals along the circumference of the connecting ring; at least two of the second detection units are arranged at intervals along the circumference of the mating ring; and the projection of the first detection unit along the axial direction of the outer ring unit is misaligned with the projection of the second detection unit along the axial direction of the outer ring unit.

[0036] In some embodiments, the elastic constant of the first spring is smaller than the elastic constant of the second spring.

[0037] In order to solve the problem of how to use a small number of sensors to detect vibration of bearings, the present invention has the following advantages:

[0038] A first detection unit is set on the outer circumferential surface of the connection end of the outer ring unit of the bearing assembly for detection, and a second detection unit is set on the outer circumferential surface of the assembly end of the outer ring unit for detection. Before the formal detection of the double-row bearing vibration begins, a preliminary detection is performed at a first speed, and the first measurement data of the first detection unit is calibrated by the second measurement data of the second detection unit, so that the interference position of the first detection unit is adjusted along the circumferential or axial direction of the outer ring unit to avoid the uneven position on the outer circumferential surface of the assembly end. After the preliminary detection is completed, the third measurement data and the fourth measurement data are obtained to ensure the reliability of the vibration detection results of the bearing assembly and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a double-row bearing vibration detection method according to an embodiment is shown;

[0040] Figure 2 A schematic diagram of a double-row bearing vibration detection system according to an embodiment is shown;

[0041] Figure 3 A schematic diagram of a first detection unit according to an embodiment is shown;

[0042] Figure 4 A schematic diagram of a second detection unit according to an embodiment is shown;

[0043] Figure 5 A schematic diagram of a double-row bearing vibration detection system according to another embodiment is shown.

[0044] Figure numerals: 10 detection component; 11 machine unit; 111 machine base; 112 rotating table; 113 pressing head; 12 first detection unit; 121 first controller; 122 first vibration transmission rod; 1221 first rod body; 1222 first rod head; 1223 first spring; 13 second detection unit; 131 second controller; 132 second vibration transmission rod; 1321 second rod body; 1322 second rod head; 1323 second spring; 20 bearing assembly; 21 inner ring unit; 211 flange; 212 first inner ring; 213 second inner ring; 22 rolling unit; 221 first rolling body; 222 first retaining frame; 223 second rolling body; 224 second retaining frame; 23 outer ring unit; 231 matching ring; 232 mounting ring; 233 connecting ring; 24 sealing unit; 241 first sealing body; 242 second sealing body. DETAILED DESCRIPTION

[0045] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0046] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "multiple" means two or more.

[0047] In this embodiment, the wheel hub bearing needs to be vibration tested before leaving the factory. The vibration test is mainly aimed at the rolling groove formed between the outer ring and the inner ring. Since the rolling body rotates in the rolling groove, if the surface of the rolling groove is uneven, it may cause the rolling body to rotate unsmoothly or even cause large vibrations. However, it is costly to arrange a large number of sensors along the outer circumferential surface of the outer ring for vibration detection. Although the data accuracy is high, in the process of obtaining the vibration detection results, a large amount of data needs to be analyzed and processed to exclude abnormal data, and the time to output the vibration detection results is long, and the efficiency is low. To this end, this embodiment discloses a double-row bearing vibration detection method, such as Figure 1 As shown, the double-row bearing vibration detection method may include steps S10 to S60, and the above steps may be described in detail below:

[0048] Step S10, based on the bearing assembly 20 being positioned on the detection assembly 10, the rotating platform 112 is controlled to rotate at a first speed. Figure 2 As shown, the bearing assembly 20 includes an inner ring unit 21, a rolling unit 22 and an outer ring unit 23. The inner ring unit 21 and the outer ring unit 23 are rotatably connected through the rolling unit 22. The detection assembly 10 includes a machine unit 11, a first detection unit 12 and a second detection unit 13. The machine unit 11 includes a rotating table 112 and a lower pressure head 113. The inner ring unit 21 is detachably connected to the rotating table 112. When the bearing assembly 20 is positioned on the detection assembly 10, the axis of the bearing assembly 20 can be vertically arranged, and the lower pressure head 113 is controlled to press downward on the outer ring unit 23 to limit the rotation of the outer ring unit 23. The end of the outer ring unit 23 close to the rotating table 112 is the connection end. The end of the outer ring unit 23 away from the rotating table 112 is the assembly end. The first detection unit 12 abuts against the outer circumferential surface of the connection end. The second detection unit 13 abuts against the outer circumferential surface of the assembly end. The outer circumferential surface roughness of the connection end is greater than the outer circumferential surface roughness of the assembly end.

[0049] The inner ring unit 21 of the bearing assembly 20 is driven to rotate by the rotating table 112, and the outer ring unit 23 of the bearing assembly 20 is fixed, so that the vibration data of the bearing assembly 20 when rotating can be obtained, which is convenient for the subsequent analysis of whether there are defects in the rolling groove. During measurement, the assembly end faces upward and the connection end faces downward, so that the lower pressure head 113 can press the outer ring unit 23 to limit the rotation of the outer ring unit 23. The rotation of the outer ring unit 23 can also be limited by other methods, such as detachable fixation, clamping, etc.

[0050] Step S20 , based on the rotation of the rotating platform 112 at the first rotation speed, acquiring the first measurement data of the first detection unit 12 and the second measurement data of the second detection unit 13 .

[0051] Step S30: adjusting the position of the first detection unit 12 at the connection end based on the first measurement data and the second measurement data.

[0052] Since the outer circumferential surface roughness of the connecting end and the assembly end is different, the surface of the assembly end is smoother, and the second measurement data obtained has higher accuracy. The second measurement data can be used as a reference for comparison with the first measurement data, so as to adjust the interference position of the first detection unit 12 to improve the accuracy of the measurement data at the connecting end.

[0053] Step S40 , based on the completion of the position adjustment of the first detection unit 12 , the rotating platform 112 is controlled to rotate at a second speed.

[0054] Step S50 : acquiring the third measurement data of the first detection unit 12 and the fourth measurement data of the second detection unit 13 based on the rotation of the rotating stage 112 at the second rotation speed.

[0055] Step S60 , analyzing and outputting the vibration detection result of the bearing assembly 20 based on the third measurement data and the fourth measurement data.

[0056] After the position of the first detection unit 12 is adjusted, the calibration before the vibration detection is completed, so as to change the rotation speed of the rotating table 112 for vibration detection. After that, multiple sets of third measurement data and fourth measurement data can be obtained through a first detection unit 12 and a second detection unit 13, so that the third measurement data and the fourth measurement data can be analyzed and calculated, and then the vibration detection result of the bearing assembly 20 can be output to ensure the accuracy of the vibration detection, and avoid the detection result being affected by the different outer circumferential surface roughness at both ends of the outer ring unit 23.

[0057] In this embodiment, step S30 may include:

[0058] Step S31 , based on the ratio of the peak value of the first measurement data to the peak value of the second measurement data being less than a first preset ratio, adjusting the position of the first detection unit 12 along the axial direction of the outer ring unit 23 .

[0059] Step S32, repeating step S20 and step S31 until the ratio of the peak value of the first measurement data to the peak value of the second measurement data is greater than a first preset ratio.

[0060] During the vibration detection process, a sensor is required to detect the vibration changes generated by the bearing assembly 20 to form a vibration curve. When the peak value of the vibration curve is too low, it may be that the distance for transmitting the stress wave between the detection position and the defect position is too large, which is easy to affect the accuracy of the subsequent vibration detection results. By comparing the difference between the peak value of the first measurement data and the peak value of the second measurement data, the position of the first detection unit 12 can be preferentially adjusted along the axial direction of the outer ring unit 23, so that the peak value of the vibration curve formed by the first measurement data is more accurate. Since the thickness of the outer ring unit 23 changes along its own axial direction, the detection position of the first detection unit 12 is adjusted along the axial direction of the outer ring unit 23, and the vibration propagation distance between the detection position and the defect position can be adjusted. Usually, the vibration propagation distance is shorter at the position where the thickness of the outer ring unit 23 is smaller, the peak value is more obvious, and the detection accuracy is higher.

[0061] In this embodiment, step S30 may include:

[0062] Step S33 , based on the ratio of the number of wave peaks of the first measurement data to the number of wave peaks of the second measurement data being greater than a second preset ratio, adjusting the position of the first detection unit 12 along the circumference of the outer ring unit 23 .

[0063] Step S34, repeating step S20 and step S33 until the ratio of the number of peaks in the first measurement data to the number of peaks in the second measurement data is less than a second preset ratio.

[0064] When the detection position abutted by the first detection unit 12 is not flat, the detection position abutted by the first detection unit 12 may frequently shift during the detection process, thereby causing the number of peaks in the vibration curve of the second measurement data to be too large, which may easily affect the accuracy of the subsequent vibration detection results. By comparing the difference between the number of peaks in the first measurement data and the number of peaks in the second measurement data, the position of the first detection unit 12 can be preferentially adjusted along the circumference of the outer ring unit 23, so that the first detection unit 12 can be adjusted to a relatively flat detection position, thereby making the vibration curve formed by the first measurement data more accurate, reducing the amount of abnormal data that needs to be eliminated when obtaining the vibration detection results later to improve the detection efficiency. The adjustable range of the first detection unit 12 along the circumference of the bearing assembly 20 is large, and it is easier to find a flat detection surface.

[0065] In this embodiment, if Figure 5 As shown, a plurality of first detection units 12 may be distributed around the circumference of the outer ring unit 23 .

[0066] Step S30 may include:

[0067] Step S35: based on the ratio of the peak values ​​of any two first measurement data exceeding a preset range, adjusting the position of the first detection unit 12 along the axial direction of the outer ring unit 23. The preset range is 1±n, where n is less than 1.

[0068] Step S36, repeating step S20 and step S35 until the ratio of the peak values ​​of any two first measurement data is within a preset range.

[0069] By setting at least two first detection units 12, the peak values ​​of the acquired multiple first measurement data can be compared with each other. Since the thickness of the outer ring unit 23 is uneven along its own axial direction, when the peak values ​​of any two first measurement data are greatly different, it can be determined that the corresponding two first detection units 12 have different heights relative to the reference horizontal plane along the axial direction of the outer ring unit 23, so that the positions of the first detection units 12 can be adjusted so that the heights of the multiple first detection units 12 along the axial direction of the outer ring unit 23 relative to the reference horizontal plane are the same, and then multiple groups of first measurement data can be obtained to calculate the average value to improve the accuracy of the vibration detection result. The reference horizontal plane is perpendicular to the axis of the outer ring unit 23.

[0070] In this embodiment, the first rotation speed may be greater than or equal to the second rotation speed.

[0071] Step S20 further includes: accumulating a first rotation time length of the rotating table 112 based on the rotating table 112 rotating at the first rotation speed.

[0072] Step S50 further includes: based on the rotating table 112 rotating at the second rotation speed, accumulating a second rotation time length of the rotating table 112. The first rotation time length is shorter than the second rotation time length.

[0073] By controlling the rotation speed and rotation duration of the rotating table 112 , the time consumed in acquiring the first measurement data and the second measurement data is reduced, thereby achieving the purpose of rapid calibration, thereby improving the efficiency of vibration detection.

[0074] In this embodiment, step S60 may include:

[0075] Step S61: based on the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data being less than a third preset ratio, the position of the first detection unit 12 is adjusted along the axial direction of the outer ring unit 23.

[0076] Step S62, repeating step S50 and step S61 until the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data is greater than a third preset ratio.

[0077] Step S63 , based on the ratio of the number of wave peaks of the third measurement data to the number of wave peaks of the fourth measurement data being greater than a fourth preset ratio, adjusting the position of the first detection unit 12 along the circumferential direction of the outer ring unit 23 .

[0078] Step S64, repeating step S50 and step S63 until the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data is less than a fourth preset ratio.

[0079] Step S65, output the vibration detection result of the bearing assembly 20 based on the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data being greater than the third preset ratio and the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data being less than the fourth preset ratio.

[0080] In the process of the rotating table 112 rotating at the second speed to obtain multiple groups of third measurement data and fourth measurement data, the vibration curve formed by the data obtained by the first detection unit 12 can be verified according to the peak value and the number of peaks of the vibration curve formed by the data of the second detection unit 13 obtained within a certain time period, so as to adjust the position of the first detection unit 12 axially or circumferentially along the outer ring unit 23, improve the accuracy of the third measurement data, and then reduce the amount of abnormal data eliminated in the process of analysis and calculation of the third measurement data and the fourth measurement data, thereby ensuring the reliability of the output vibration detection result.

[0081] In this embodiment, a double-row bearing vibration detection system is disclosed, and the double-row bearing vibration detection system is applied to a double-row bearing vibration detection method in any of the above embodiments. Figure 2 As shown, the double-row bearing vibration detection system may include a detection assembly 10 and a bearing assembly 20 .

[0082] The detection assembly 10 may include a machine unit 11, a first detection unit 12, and a second detection unit 13. The machine unit 11 includes a base 111, a rotating table 112, and a lower pressure head 113. The rotating table 112 is rotatably connected to the base 111. One end of the lower pressure head 113 is slidably connected to the base 111. The first detection unit 12 includes a first controller 121 and a first vibration transmission rod 122. The first controller 121 is drivingly connected to the first vibration transmission rod 122. The second detection unit 13 includes a second controller 131 and a second vibration transmission rod 132. The second controller 131 is drivingly connected to the second vibration transmission rod 132.

[0083] The bearing assembly 20 includes an inner ring unit 21, a rolling unit 22, an outer ring unit 23, and a sealing unit 24. The inner ring unit 21 and the outer ring unit 23 are rotatably connected through the rolling unit 22. The inner ring wall of the sealing unit 24 abuts against the outer peripheral wall of the inner ring unit 21. The outer ring wall of the sealing unit 24 abuts against the inner peripheral wall of the outer ring unit 23.

[0084] The inner ring unit 21 is detachably connected to the rotating table 112. The lower pressure head 113 limits the rotation of the outer ring unit 23. The outer ring unit 23 includes a matching ring 231, a mounting ring 232, and a connecting ring 233. The matching ring 231, the mounting ring 232, and the connecting ring 233 are integrally formed in sequence. The connecting ring 233 is arranged at one end of the outer ring unit 23 close to the rotating table 112. One end of the first vibration transmission rod 122 abuts against the outer circumferential surface of the connecting ring 233. One end of the second vibration transmission rod 132 abuts against the outer circumferential surface of the matching ring 231. The outer circumferential surface roughness of the connecting ring 233 is greater than the outer circumferential surface roughness of the matching ring 231.

[0085] The outer ring unit 23 is fixedly positioned by the lower pressing head 113, and the rotating table 112 drives the inner ring unit 21 to rotate. Figure 5 As shown, a plurality of first vibration transmission rods 122 can be distributed at circumferential intervals along the connecting ring 233, and a plurality of second vibration transmission rods 132 can be distributed at circumferential intervals along the mating ring 231, so that the vibration stress wave transmitted from the rolling unit 22 to the outside of the outer ring unit 23 can be obtained, and then the obtained data can be analyzed and the vibration detection results can be output.

[0086] In other embodiments, Figure 2As shown, the inner ring unit 21 may include a flange 211, a first inner ring 212, and a second inner ring 213. One end of the first inner ring 212 is integrally formed with the flange 211, and the other end is inserted into the second inner ring 213. The rolling unit 22 may include a first rolling body 221, a first retaining frame 222, a second rolling body 223, and a second retaining frame 224. The first rolling body 221 is spaced along the circumference of the first inner ring 212. A first retaining frame 222 for support is provided between two adjacent first rolling bodies 221. The second rolling body 223 is spaced along the circumference of the second inner ring 213. A second retaining frame 224 for support is provided between two adjacent second rolling bodies 223. The sealing unit 24 may include a first sealing body 241 and a second sealing body 242. The first sealing body 241 is provided in the area between the first inner ring 212 and the connecting ring 233 to prevent external foreign matter from entering. The first sealing body 241 is located on a side of the first rolling body 221 away from the second rolling body 223. The second sealing body 242 is disposed in the area between the second inner ring 213 and the matching ring 231 to prevent external foreign matter from entering. The second sealing body 242 is located on a side of the second rolling body 223 away from the first rolling body 221.

[0087] In this embodiment, if Figure 3 , Figure 4 As shown, the first vibration transmission rod 122 includes a first rod body 1221, a first rod head 1222, and a first spring 1223. One end of the first rod head 1222 abuts against the outer circumferential surface of the connecting ring 233, and the other end is slidably connected to the first rod body 1221. One end of the first rod body 1221 away from the first rod head 1222 is drivingly connected to the first controller 121. The first spring 1223 is arranged on the first rod body 1221. The first spring 1223 applies an elastic force to the first rod head 1222. The first rod head 1222 has a tendency to escape from the first rod body 1221 under the elastic force of the first spring 1223. The second vibration transmission rod 132 includes a second rod body 1321, a second rod head 1322, and a second spring 1323. One end of the second rod head 1322 abuts against the outer circumferential surface of the connecting ring 233, and the other end is detachably connected to the second rod body 1321. One end of the second rod body 1321 away from the second rod head 1322 is drivingly connected to the second controller 131. The second spring 1323 is disposed on the second rod body 1321. The second spring 1323 applies an elastic force to the second rod head 1322. The second rod head 1322 has a tendency to escape from the second rod body 1321 under the elastic force of the second spring 1323. The minimum diameter of the first rod head 1222 is smaller than the minimum diameter of the second rod head 1322.

[0088] The first spring 1223 and the second spring 1323 ensure that the first rod head 1222 and the second rod head 1322 can always keep in contact with the outer ring unit 23 during the vibration detection process of the bearing assembly 20, so as to facilitate the acquisition of accurate detection data. Since the outer circumferential surface roughness of the connecting ring 233 is greater than the outer circumferential surface roughness of the matching ring 231, the minimum diameter of the first rod head 1222 can be set to be smaller than the minimum diameter of the second rod head 1322, that is, the contact area between the first rod head 1222 and the connecting ring 233 is smaller than the contact area between the second rod head 1322 and the matching ring 231, thereby reducing the influence of the uneven outer circumferential surface of the connecting ring 233 on the vibration detection data, and improving the accuracy of the first rod head 1222 in acquiring vibration data.

[0089] In this embodiment, if Figure 5 As shown, at least two first detection units 12 are arranged at intervals along the circumference of the connecting ring 233, and the angle between the two first detection units 12 can be greater than 0° and less than or equal to 180°. At least two second detection units 13 are arranged at intervals along the circumference of the matching ring 231, and the angle between the two second detection units 13 can be greater than 0° and less than or equal to 180°. The projection of the first detection unit 12 along the axial direction of the outer ring unit 23 is misaligned with the projection of the second detection unit 13 along the axial direction of the outer ring unit 23.

[0090] By setting two first detection units 12 and two second detection units 13, the multiple detection data obtained by the first detection unit 12 can be mutually verified with the multiple detection data obtained by the second detection unit 13, and the detection data between the two first detection units 12 can also be mutually verified and calibrated, thereby improving the accuracy of the output vibration detection results and reducing the generation of abnormal data. The projection misalignment between the first detection unit 12 and the second detection unit 13 can reduce the mutual influence of vibrations generated between different detection positions and improve the accuracy of the vibration detection results.

[0091] In this embodiment, if Figure 3 , Figure 4 As shown, the elastic coefficient of the first spring 1223 is smaller than the elastic coefficient of the second spring 1323. Since the outer circumferential surface of the connecting ring 233 is relatively rough, the vibration fluctuation detected by the first detection unit 12 may be relatively large, so a long and thin first spring 1223 can be used to facilitate the detection of the fluctuation amount and improve the detection accuracy. The outer circumferential surface of the matching ring 231 is relatively smooth, resulting in a small vibration fluctuation detected by the second detection unit 13, and a short and thick second spring 1323 can be used to increase the pressing force, eliminate interference factors, and improve measurement accuracy.

[0092] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A double-row bearing vibration detection method, characterized in that: The double-row bearing vibration detection method comprises: Step S10, based on the completion of the positioning of the bearing assembly on the detection assembly, control the rotating table to rotate at a first speed; wherein the bearing assembly includes an inner ring unit, a rolling unit and an outer ring unit; the inner ring unit and the outer ring unit are rotationally connected through the rolling unit; the detection assembly includes a machine unit, a first detection unit and a second detection unit; the machine unit includes the rotating table and a lower pressure head; the inner ring unit is detachably connected to the rotating table; the lower pressure head limits the rotation of the outer ring unit; the end of the outer ring unit close to the rotating table is the connecting end; the end of the outer ring unit away from the rotating table is the assembly end; the first detection unit is in contact with the outer circumferential surface of the connecting end; the second detection unit is in contact with the outer circumferential surface of the assembly end; the outer circumferential surface roughness of the connecting end is greater than the outer circumferential surface roughness of the assembly end; Step S20, based on the rotation of the rotating table at the first speed, acquiring first measurement data of the first detection unit and second measurement data of the second detection unit; Step S30, adjusting the position of the first detection unit at the connection end based on the first measurement data and the second measurement data; Wherein, the step S30 includes: Step S31, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak value of the first measurement data to the peak value of the second measurement data being less than a first preset ratio; Step S32, repeating step S20 and step S31 until the ratio of the peak value of the first measurement data to the peak value of the second measurement data is greater than the first preset ratio; Step S40, based on the completion of the position adjustment of the first detection unit, controlling the rotating table to rotate at a second speed; Step S50, based on the rotation of the rotating table at the second speed, acquiring third measurement data of the first detection unit and fourth measurement data of the second detection unit; Step S60: Analyze and output the vibration detection result of the bearing assembly based on the third measurement data and the fourth measurement data.

2. A double-row bearing vibration detection method according to claim 1, characterized in that: The step S30 comprises: Step S33, adjusting the position of the first detection unit along the circumference of the outer ring unit based on the ratio of the number of wave peaks of the first measurement data to the number of wave peaks of the second measurement data being greater than a second preset ratio; Step S34, repeating step S20 and step S33 until the ratio of the number of peaks of the first measurement data to the number of peaks of the second measurement data is less than the second preset ratio.

3. A double-row bearing vibration detection method according to claim 1, characterized in that: There are a plurality of first detection units distributed around the circumference of the outer ring unit; The step S30 comprises: Step S35, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak values ​​of any two of the first measurement data exceeding a preset range; wherein the preset range is 1±n; n is less than 1; Step S36, repeating the step S20 and the step S35 until the ratio of the peak values ​​of any two of the first measurement data is within the preset range.

4. A double-row bearing vibration detection method according to claim 1, characterized in that: The first speed is greater than or equal to the second speed; The step S20 further includes: accumulating a first rotation time length of the rotating table based on the rotating table rotating at the first rotation speed; The step S50 further includes: based on the rotating table rotating at the second rotation speed, accumulating a second rotation time length of the rotating table; the first rotation time length is shorter than the second rotation time length.

5. A double-row bearing vibration detection method according to claim 1, characterized in that: The step S60 comprises: Step S61, adjusting the position of the first detection unit along the axial direction of the outer ring unit based on the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data being less than a third preset ratio; Step S62, repeating step S50 and step S61 until the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data is greater than the third preset ratio; Step S63, adjusting the position of the first detection unit along the circumference of the outer ring unit based on the ratio of the number of wave peaks of the third measurement data to the number of wave peaks of the fourth measurement data being greater than a fourth preset ratio; Step S64, repeating step S50 and step S63 until the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data is less than the fourth preset ratio; Step S65, output the vibration detection result of the bearing assembly based on the fact that the ratio of the peak value of the third measurement data to the peak value of the fourth measurement data is greater than the third preset ratio and the ratio of the number of peaks of the third measurement data to the number of peaks of the fourth measurement data is less than the fourth preset ratio.

6. A double-row bearing vibration detection system, the double-row bearing vibration detection system is applied to a double-row bearing vibration detection method according to any one of claims 1 to 5, characterized in that: The double-row bearing vibration detection system comprises: The detection component includes a machine unit, a first detection unit, and a second detection unit; the machine unit includes a machine base, a rotating table, and a pressing head; the rotating table is rotatably connected to the machine base; one end of the pressing head is slidably connected to the machine base; the first detection unit includes a first controller and a first vibration transmission rod; the first controller is drivingly connected to the first vibration transmission rod; the second detection unit includes a second controller and a second vibration transmission rod; the second controller is drivingly connected to the second vibration transmission rod; A bearing assembly, the bearing assembly comprising an inner ring unit, a rolling unit, an outer ring unit, and a sealing unit; the inner ring unit and the outer ring unit are rotatably connected through the rolling unit; the inner ring wall of the sealing unit abuts against the outer peripheral wall of the inner ring unit; the outer ring wall of the sealing unit abuts against the inner peripheral wall of the outer ring unit; The inner ring unit is detachably connected to the rotating table; the lower pressure head limits the rotation of the outer ring unit; the outer ring unit includes a mating ring, a mounting ring, and a connecting ring; the mating ring, the mounting ring, and the connecting ring are integrally formed in sequence; the connecting ring is arranged at one end of the outer ring unit close to the rotating table; one end of the first vibration transmission rod is in contact with the outer circumferential surface of the connecting ring; one end of the second vibration transmission rod is in contact with the outer circumferential surface of the mating ring; the outer circumferential surface roughness of the connecting ring is greater than the outer circumferential surface roughness of the mating ring.

7. A double-row bearing vibration detection system according to claim 6, characterized in that: The first vibration transmitting rod comprises a first rod body, a first rod head, and a first spring; one end of the first rod head abuts against the outer circumferential surface of the connecting ring, and the other end is slidably connected to the first rod body; one end of the first rod body away from the first rod head is drive-connected to the first controller; the first spring is arranged on the first rod body; the first spring applies an elastic force to the first rod head; the first rod head has a tendency to escape from the first rod body under the action of the elastic force of the first spring; the second vibration transmitting rod comprises a second rod body, a second rod head, and a second spring; one end of the second rod head abuts against the outer circumferential surface of the connecting ring, and the other end is detachably connected to the second rod body; one end of the second rod body away from the second rod head is drive-connected to the second controller; the second spring is arranged on the second rod body; the second spring applies an elastic force to the second rod head; the second rod head has a tendency to escape from the second rod body under the action of the elastic force of the second spring; the minimum diameter of the first rod head is smaller than the minimum diameter of the second rod head.

8. A double-row bearing vibration detection system according to claim 6, characterized in that: At least two of the first detection units are arranged at intervals along the circumference of the connecting ring; at least two of the second detection units are arranged at intervals along the circumference of the mating ring; a projection of the first detection unit along the axial direction of the outer ring unit is misaligned with a projection of the second detection unit along the axial direction of the outer ring unit.

9. A double-row bearing vibration detection system according to claim 7, characterized in that: The elastic coefficient of the first spring is smaller than the elastic coefficient of the second spring.

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